Positioning method for flight light source in traffic tunnel on the basis of white light LED (Light Emitting Diode)

Abstract

The invention relates to a positioning method for a flight light source in a traffic tunnel on the basis of a white light LED (Light Emitting Diode). Receivers are evenly arranged on the top in the traffic tunnel, a single receiver has an equal distance with the surrounding adjacent receivers, three mutually-adjacent receivers are in regular triangle arrangement, a non-transparent plate of which the area is smaller than the light beam receiving area is fixed below each receiver; two receivers of which the irradiation dark spots have a biggest light and shade luminance difference with an imageformed by a light source light beam from multiple receivers irradiated by certain positioning object serve as optimal receivers; through a method for positioning the light source according to two coordinate rays, the two optimal receivers judge the areas of a region with strongest illuminance and a region with weakest illuminance as well as a dark spot boundary width range caused by diffraction bya preset threshold value interval, and the position of the positioning object is judged.

Description

technical field [0001] The invention relates to the technical field of visible light communication, in particular to a method for positioning a flying light source in a traffic tunnel based on a white light LED. Background technique [0002] With the development and progress of LED light source technology, white LEDs with the advantages of high brightness, low power consumption, and long life have gradually replaced fluorescent lamps and incandescent lamps. Due to the convenient modulation and quick response of white light LED communication, it has obvious advantages compared with infrared, ultraviolet, radio frequency and other methods in terms of harmless radiation, confidentiality and stability. It has become an emerging visible light communication (VLC) method, which is being gradually promoted to Positioning field in traffic tunnel. The existing LED positioning method can maintain the stability of the channel and has strong operability, but there is no specific model f...

AI Technical Summary

Problems solved by technology

These characteristics make users face many problems in terms of large differences between positioning data and actual mobile behavior, and wrong determination of mobile device status.

And for the positioning object, it is more difficult to locate the internal signs of the mountain or underground traffic tunnel online map than the open surface space, which brings great challenges to the normal operation of the positioning terminal

Due to the low accuracy of GPS positioning in the tunnel and the flight status of the positioning object will seriously affect the effectiveness of positioning, it has become a priority to study how to make full use of incident light to determine the behavior characteristics of moving targets, avoid or reduce interference, and avoid mobile positioning delays and errors. The important problems to be solved in the design of the positioning system

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